Gate-valve.



- this. speci cat1on,'in' w ich Flgure'l 1s acentral--sect1on"of m'y 1m-2 is an end VIEW i metal and seating against JAMES M. BROWN,- orMANSFIELD, OHIO.

GATE-VALVE.

No; o'os,e54

Specification of Letters Patent.

Patented Nov. 10, 1908.

I Application filed April 12,1906. Serial No. 255,120.

To all whom it may conce'r'na v Be it known that I, Jams M.-BROWN, ofMansfield, Richl'and' county, Ohio, have invented a new and usefuGate-Valve, of which the followin is a full, clear, and exactdescription, reerence being had to the accompa'n g. drawin s, formingpart of.

proved valve; and .Fig with one half of the casmgremoved.

My invention relates to the class of gate valves, and is designed toprovide animproved valve of this character, wherein the valve shall bein ,perpetuahcontact with its seat at all times whether in open orclosedposition.

The object of the invention is to provide an imprbved valve 'in-whichthe operating mechanism is protected from any material carried bythefluid held in check or passthrou h the valve; also to rovide the vav'e witE two seats, one of w ich is stationary and the other adjustable;and to do away with all cushions,-the valve bein of metal at all times.in which I have shown 7 ,In the drawings,

lied to a blo'w-oflt' valve,

my invention as app I show a valve casing made in t'wo parts, 2-

and 2 having circumferential flanges secured together by bolts 3. Thesetwo parts are recessed in their meeting faces to provide a valve chamberwhich is preferably circular in form as shown, and is eccentric} tothepassageway 4' extending through the casing.

The'valve 5 consists of a plate or disk of lobe sha e of sli htlv lessthickness than the widtho the valve chamber and eccentrically pivotedupon the pin 6. The valve is referably loosely mounted on this pin'which phrojects into one half of the valve casing. e valve is providedwith a circular openin 7 arranged to be brought into registrfy wit thepassageway 4:, the solid ortion o the valve being arra ed to close t eport when the valve is turne In order to, turn the valve upon its axis,I

' preferably provide it with an arc-shaped rack 8, the pitch line of theteeth being concentrlcwith the axis 6. These. teeth are enga ed byapmion 9, preferably of the same thickness as the valvedisk and mountedin thevalve chamber, this pinion bein secured to'astub-shaft 10 whichprojects through a stuifi'ng-box 11 in the face of the casing, and isprovided with an angular stem 12.

The seats for the valve comprise a stationary removable metallic ring 13and an adjustable metallic ring 14 having an externally screw-threadedportion engaging a correspondingly inner screw-threaded portion in oneof the casin halves. The ring or bushing 14 is preferably provided withinner rejections 15 to receive a spanner for adusting it. The ad'ustableseat is adjusted so that there is su cient pressure upon the valve diskto seal it.

It will be noted that when the valve is turned into either positionthere is a erpetual contact between the valve disk an the metallic valveseats on both sides. No elastic packing for the valve is employed, thethick-, n'ess of the closing portion of the valve being the same as thethickness of the a ertured ortion, and the'valve. being planeaced onboth'sicles in that portion which moves over the valve seats Theadvantages of my invention result from protecting the. operatingmechanism from the action of the fluid or substances contained therein,also from the compact arran ement of the'same. The use of themetallicdisk which is in continuous contact with two seats avoids allcushion contact and gives perpetual metallic contact with metal tometal. oints.

Variations may be made in the form and arrangement of the metallic valverings or bushings, the valve disk and the other parts without departingfrom my invention.

I claim In a gate valve, a casing made in two di vided halves with aneccentric-valve chamber beta een them, said parts having a pas sagewayextending through the chamber, a a

plate valve pivoted in the chamber and havpivot of the valve and in theplane of the mg ahole arranged to re ister with the pasvalvesubstantially as described. 10 sageway, a pair of metfilic seat rin sheld In testimony w lereof, I have hereunto set I in perpetual ri%idcontact with the p ate, at my hand.

5 least one of sale rings being adjustable, and JAMES -M BROWN.

:1 toothed wheel Withm the chamber arran ed \Vitnesses: to oscillate thevalve plate; said Wheel bemg BEN IIURXTHAL,

at the same side of the passageway as the A. F. BLACK.

